Longshine LCS-8156C1 - Manual (Page 103)

AT Commands for CX930xx Modem Reference Manual
102752B Conexant 3-79
%TT14 - V.22 originate [call mark] signalling at 600 bps
Command syntax:
%TT14
%TT15 - V.22 originate [call mark] signalling at 1200 bps
Command syntax:
%TT15
%TT16 - V.22 bis originate [call mark] signalling at 2400 bps
Command syntax:
%TT16
%TT17 - V.22 answer signalling (guard tone: 1800Hz, 550Hz, none) at 1200bps
Command syntax:
%TT17<guard tone>
<guard tone>
0 none
1 550 Hz
2 1800 Hz
%TT18 - V.22 bis answer signalling (guard tone: 1800Hz, 550Hz, none) at 2400bps
Command syntax:
%TT18<guard tone>
<guard tone>
0 none
1 550 Hz
2 1800 Hz
%TT19 - V.21 channel 1 space symbol
Command syntax:
%TT19
%TT1A - V.21 channel 2 space symbol
Command syntax:
%TT1A
%TT1B - V.23 backward channel space symbol
Command syntax:
%TT1B